Physician&#39;s head mirror



' Feb. 13, 1940. s GOLUB ET AL I PHYSICIANS HEAD MIRROR Filed Nov. 27, 1937 INVE\! o S BerIz era Hammer Q mm Patented Fe 13,194o' 1 v 2,190,473 t v UNlTEDQ STATES PAT NT OFFICE} I I Y. 7 Application November 27, 1937, Serial No. 176,783

Iv I I 3 Claims. (01. 128-21) I. This invention relates to new and useful im- Fig. 5 is a sectional view taken on the line 55 I provements in a physicians head mirror. of Fig. 4. The invention has for an object the construc- .Fig. 6 is a sectional perspective view of the .tion of a device as mentioned which is characmirror, per se. I I 5 terized by an annular casing of some phenol con- Fig. 7 is a sectional view similar to Fig. 4 but i densation product, as Bakelite, which has a flange illustrating a modification of the invention. I portion on its front face and a threaded internal The physicians head mirror, according to this portion adjacent its rear face and adapted to invention, includes an annular casing Ill having support a concave mirror'in conjunction With a -I a flange portion Ill on its front face and a 10 back cover disc. threaded internal portion lO adjacent its rear It is proposed to provide the concave mirror face. A concaved mirror H is mounted within with a flange portion adapted to rest against the the casing l0 and has a flange portion I l resting flange portion of the annular casing and to ar against the flange portion Ill A back cover disc range the back cover disc to threadedly engage l2 threadedlyengages the threaded portion Hl 5 the threaded internal portion of the annular and is formed with aprojecting annular bead 52 casing, and to have a projecting annular bead engaging the rear face of the flange ll of the engageable against the rear face of the flange mirror for holding the mirror fixedly in place. portion of the mirror for "holding the mirror The annular casing l0 and the back cover disc fixedly. l2 preferably should be made from some phenol 2 Still further the invention proposes the procondensation product such as Bakelite. This vision of 'a gasket disc interposed between the material has sufficient rigidity to properly hold back cover and the back of the mirror for prothe mirror in position, and at the same time is tecting the silvering of the mirror. sufficiently soft so as not to crack or damage Another object of the invention is to arrange the mirror by gripping it too tightly at its flange a knob on the back cover disc by which the portion H I 25 cover disc may be gripped to screw it in and The periphery of the disc: I2 is formed with remove it from the annular casing, and it is threads which threadedly engage the threaded contemplated to form the knob'with a spherical portion I0? of the annular casing. The annular head adapted tobe utilized as one of the elements bead I2 is of a slightly smaller diameter than the of the spherical joint for universally supporting threaded area of the cover disc. At its front 30 the mirror. I the cover disc [2 is formed with an opening l4,

,Still further the invention proposes a modiflca the inner end portion of Which is nde y tion characterized by arranging the knob longia projecting tubu portion he ror l tudinally movable and to be connected With a s formed With a Central Opening s t which stem adapted to fixedly engage an opening in the tubular P01111011 p j This projectin 35 the back of the mirror as hereinafter more fully h t 130 p p y Center e mirror described. r I with n the annular casing. The opening l4 per- For further comprehension of the invention, mits a Phy a 1 3 100k Wrough at person and of the objects and advantages thereof, refunder Proper ljlghtnflg me e illustrated 4o erence will be had to the following description descntbtad i i i zg 2 m ar- 40 and accompanying drawing, and to the appended rangemen. is we nown o ose s e m e art. a claims 1n wh1ch the various novel features of the A gasket disc n is interposedvbetween the inner inventlon are more Partmulaltly set face of the mirror I I and the adjacent face of the In the Q P W draiwmg formmg disc [2. This gasket I! is for the purpose of pro- 45 .terial of 5 P tecting the silvered inner face of the mirror 1 1S a perspectlvevlew of a physiclan's head against damage when the back cover disc I2 is I mirror viewed from the front and constructed Screwed nt position The n is formed accordin t0 this invention I I with a central opening l8 through which the Fig. 2 is ap p View Of the cv Shown projecting portion l5 extends. The gasket disc 50 in Fig. 1 viewed from theIrear. I1 is of a slightly smaller diameter than the Fi 3 i a vertical tiona vi w ta e o the diameter of the annular bead l2 and is to rest line 3-3 of Fig. 1. I I against the face of thecover disc I2.

Fig. 4 is a fragmentary enlarged detailed view On the outer face and near its perimeter, the

of a portion of Fig. 3. back cover disc I2 isprovided with a knob 20 by 55 I and threadedly engages into the knob 29.

which the cover disc may be readily gripped and turned to screw it into or to remove it from the annular casing it.

The knob 28 has a spherical outer end 2B adapted to form one element of a universal joint, not shown on the drawing, generally used to support physicians head mirrors. The innerend of the knob 28 is provided with a square shank portion engageablewithin'a receiving square opening 2! formed in the outer face ofthe cover disc 12. Aligned with this square opening, but formed inwards from the inner face of the cover disc 22, there is a square recess 22 in whicha washer 23 is positioned. A screw 24 engages through this washer, and through the wall of the cover disc i2 at the base of the recess 22 screw 24% serves to fixedly hold the knob-in position. I

In Fig. 7 a modification of the invention has been disclosed which distinguishes from the prior form essentially in the mounting and supporting of the knob 29. According to this form of the invention there is a stem 24' which is formed intermediate of its ends with a flange 2d This flange 2 3 is slidably engaged in the recess 22. The stem Ed has a threaded end 2 1* which threadedly engages into the knob 25 to hold the knob in position. A small expansion spring 25 is disposed within the recess 22 and acts between the base of the recess -and-the flange 2d for normally urging the stern 2d inwards. In the latter position of the stem its end passes through an opening 2d formed in the gasket dis-c H and engages into another opening 2? formed in the rear face of the mirror 5 l.

The knob 29 may be slightly drawn outwards as permitted by the compression of the spring '25 to disengage the stem 24 from the opening 27 when desired. This is of utility in removing the cover disc I2 from the casing 50 after these parts have been assembled for sometime an they are sticking to each other.

The use of the stem 24 may be better understood from the following: To assemble the head mirror the mirror I I is placed against the cover disc l2 in a position in which the stem 2 3 engages in the opening Z'l. The parts are thus keyed together. It is now possible to rotate the cover disc i2 by using the knob 28 as a handle and screw it into the casing It. The mirror ll will rotate along with the cover disc I2 so that there is no possibility of relative turning between the mirror H and the gasket disc ll. Thus there is no possibility of the silvering on the rear of the mirror becoming scratched. The cover disc l2 may be removed by turning it and gripping the knob 28. But should the parts be stuck together and when an attempt is made to turn the cover disc i 2, it becomes apparent that too much stress is necessary to accomplish actual turning, then the knob 20 may be pulled outwards slightly to disconnect the stem This 24 from the mirror m Now it will require less force to turn the cover. l2 since the additional load of turning the mirror II has been re- I moved.

While wehave illustrated and described thepreferred embodimentsof our invention, it isto Having thus described our invention, what we I claim as new, and desire to secure by'Unitecl States Letters Patent is:

1. A physicians head mirror comprising an annular casing. having a flange portion on its front face and a threaded internal portion adjacent its rear face, a concaved mirror within said casing having a flange portion resting against I said flange portion, a back cover disc threadedly engaging said threadedinternal portion having 3 a projecting annular bead engaging the rear face of the flange of said mirrorlfor holding the mirror fixedly, and a gasket disc interposed between the back of the mirror and the adjacentface of said cover disc, said coverdisc being formed.

with a central opening aligned with an opening at the center of said mirror, and a projecting flange being arranged on the cover disc and extending into the opening of said mirror.

2. A physicianshead mirror comprising an annular casing having a flange portion on its front face and a threaded internal portion adjacent its rear face, a concaved mirror within said casing having a flange portion resting against 'f engaging said threaded internal "portion having .r

said flange portion, a back cover disc threadedly a projecting annular bead engaging the rear face of the flange of said mirror for holding the mirror fixedly, and a-knob mounted on the back face of said cover disc near the periphery thereof,

said knob having a spherical outer end, and at its inner end being provided with a square shank engageable into a square opening in said cover' disc, and a screw for holding said knob on said I cover disc.

3. A physicians'head mirror comprising an annular casing having a flange portion on its 1 front face and a threaded internal portion adjacent its rear face, a concaved mirror within said casing having .a flange portion resting against said flange portion, a back cover disc threadedly engaging said threaded internalportion having a projecting annular bead engaging the rear face of the flange of said mirror for holding the Q i mirror fixedly, a stem axially slidably mounted through said back cover, a knob on the back of said cover disc held in position by said stem i" resilient means urging said knob and stem inwards, and the inner end of said stem engaging 

